recommendations for marking / registering e-bike

[ETAF]

I have seen a lot of things for registering marking an e-bike

data dots
forensic marking
BikeRegister: The National Cycle Database

What do people recommend , on out old bikes (about £150 in the 90's each ) we just used a infrared marker pen and put the postcode

Now we have £1000's , worth of bike

what are the best options to mark, register ???

Now on House contents , all they took was the e-bike value - no other details , locks, stored , frame numbers etc , which i was expecting to have to answer

[Paulatic]

In my area the police encourage protecting quads and tackle with Smartwater https://shop.smartwater.com/secure-your-vehicle/
As stolen bicycles are rarely traced is it worth it?